Weighing mechanism



Feb.v v19 1924.

L. T. JOHNSON WEIGHING MECHANISM Feb. 19 1924. 1,483,888

L. T. JOHNSON WEIGHING MECHANI SM Filed June 5, 1922 3 Sheets-Sheet 3 jim/eww?! Patented Feb. 19, 1924.

LEONARD T. JOHNSON, OF JERSEY CITY, NEW JERSEY.

WEIGHING MECHANISM.

Application led June 3,

To all whomy t 'may concern.'

Be it known that I, LEONARD T. JOHNSON, a citizen of the United States, residing at Jersey City, county of Hudson, State of New Jersey, have made a certain new and useful invention in Weighing Mechanism, of which the following is a specilication.

This invention relates to'weighing mechanism, and more particularly to such type of mechanism as is employed in visible scale structures. l

The object of the invention is to provide a weighing mechanism which is simple in structure, eiicient in operation, and economical of manufacture.

A further dbject of the invention is to provide in a scale structure a novel, efficient and economical form of lever arrangement.

A further object of the invention is to provide in a structure of the class described, a simple, ecient and economical thermostat for automatically maintaining the scale readings accurate notwithstanding temperature variations.

Further objects of the invention will appear more fully hereinafter.

The invention consists substantially in the construction, combination, location, and relativearrangemcnt of parts, all as will be more fully hereinafter set forth, as shown by the accompanying drawings, and finally pointed out in the appended claims.

Referring to the drawings,

Fig. 1 is a view in front elevation of a scale mechanism, embodying the principles of my invention.

Fig. 2 is a side view of the same in vertical section.

Fig. 3 is a front view of the same in vertical section.

Fig. 4 is a detail view in side elevation showing a form of pivot arrangement employed in acordance with my invention.

Fi 5 is a sectional view taken on the line 5, 5,`ig. 4, looking in the direction of the arrows.

Fig. 6 is a top plan view of a lever mechanism employed in accordance with my invention.

Fig. 7 is a similar view of the platform employed in connection therewith.

Fig. 8 is a view in perspective of a lever mechanism employed in accordance with my invention.

Figs. 9 and 10 are respectively plan and 1922. Serial No. 565,610.

elevation views showing a method of attachment of therespective levers employed in accordance with my invention.

Fig. 11 is a view in front elevation of a thermostat structure embodying the principles of my invention.

Fig. 12 is a rear view of the same.

Fig. 13 is a sectional view taken on the line 13, 13, Fig. 11, and looking in the direction of the arrows.

Fig. 14 is a similar view taken on the line 14, 14, Fig. 11, looking in the direction of the arrows.

Fig. 15 is a similar view taken on the line 15, 15, Fig. 11, and looking in the direction of the arrows.

The same part is designated by the same reference character wherever it occurs throughout the several views.

It is among the special purposes of my present invention to provide a scale mechanism wherein a most eflicient leverage structure is afforded, and wherein an exceedingly simple, efficient and novel type of thermostat is employed.

Figs. 1 to 10 inclusive are directed especially to the leverage or check rod construction of the scale of my invention, including, of course, the housing for the same.

Referring particularly to Figs. 1, 2, and 3, reference numeral 1 designates a base casting on which the usual post 2, which contains the upwardly extending portion of the scale, rests. Similarly, the shell or lever cover 3 is supported by the base 1, and encloses the lever construction, to be hereinafter described. In the lever construction, the lever 4 is pivoted to the base 1, or to be more accurate, the portion 3 supported thereby, at the front end of the mechanism, by means of the usualv pivot connection employed in scale mechanism of this nature indicated at 5. Lever 4 has attached thereto the frame 6, see Figs. 2 and 8, by means of pivoted agate bearings 7, which will be more fully hereinafter described. The platter plate 9 is supported by the frame 6 in the arrangement shown in Fig. 2, at 10 in Fig. 6. In order to keep the frame 6 parallel at all times, check rods 11 and 12 are used. Two plates 13 and 14 are fastened to the frame 6 in any suitable manner, for example, by means of screws. Two similar plates 15 and 16 are rigidly fastened to the end casting of the base 1. The plates 13, v14,

are so constructed as shown in 8, l and l0, that the check rods 1l and can be easily slipped into and out of place therein. One simple arrangement for eilecting; this is shovvn perhaps best in Figs. G to lll inclusive, wherein, for example, plates l5 and l@ ditler in shape at their tops and ends, so that the end of the lever ll lits thereover, as shoivn in Fig. S, and the ends el' check rod l2 extend through an orifice attarder therefor between the plates ai d i6, as shovn in Figs. 9 and lll. usual dash pot 1S is supported by the l l. and is i( tened by the piston rod il) to the platter plate 9. ln Fin'. T the part designated by relier-ence numeral 2O is in eft'ect a corer which mores up and doivn over the top part of the shell 3. ivith the platter res" Q. thereby making the base dust-proof.

ence numeral designates depression formed in the base l, which is employed as third toot or support for the scale, terably at the rear olthe mechanism, o tivo feet or re ts being indicated t The rest is p e erably a depres- .-i n not only because o he simplicity of rnetion resultingtherefrom, i. e., enathe base to be a stamping, but also fives extra room lor the lever d to operin. rllhe end ot the lever el is connected b v the thermostatically controlled arrangement to be hereinafter described and through the medium of the actuating` rod containing the usual raclr teeth A which mesh with the gear Wheel Q5, Which controls the graduated scale member 2G which rotates Within the casing 2T mounted upon the post l .vill noiv describe the connection between the trame 6 and the lever l, which has be 'i briei'ly designated by reference numeral T, and which has been shown more clearljv in detail in Figs. 4 and 5. Lever has secured thereto the agate pivot 'which acts as a hanger for a saddle 3l. The saddle 231 at its lower end is pivotally supported as at S2 by the end oit the frame 6. This structure is of cours, duplicated on both sides oi the lever l, as will be readily understood.

l rvill now describe the thermostat employed in accordance with my invention, and which. While illustrated in Q, is ed in detail in Figs. ll to l5 inclusive. -.11 this arrangement reference numeral l0 designates the steel yard arm which is secured in any suitable manner, for example. screived, into the cap stl at the bottom ot spring l2. Reference numeral 43 designates a connection `fastened to the steel yard arm llt), and which has pivotally seillustra 'cured theretor et Vits other end the respective arms et a forli 44. Thelower end of the V:Eorlr Varm i-i'spivotally'secured to a member'et,which is likewise'formed as a fork,

the the mot ,tie -i bends. and as the upier end tl creer securely tasteneil, the lower end th aereo/f moves in one direction or the other t yreby orteningr or lengtheni 'i' the ro in ecc lance with the direc-dta. oi movement ol the thermostatic metal all'. or, in other Words, in accordance with Whether the temperature change is to a cooler or Warmer decree. lxs the springs employed in seal i is type shorten and stillen in cold ivf ier they draw up, drawwith it. and vice versa,

t the thermostat is dei compensate for these pe of: thermostat has numerous adv over those heretofore employed in this art. the principal ones being that it is an exceedingly simple construction and e iploys only one connection with the lever oi the Viveiefhinfr and indicating mechanism. and therefore is enabled to keep the scale reading correct at Zero position, and at capacity position. and in consequence at intermediate positions.

Many modifications and changes in details will readily occur to those skilled in the art Without departing from the spirit ano scope oit my invention as delined in the claims, and l desire to have the scale mechanism in its respective parts and in its entirety as herein shown and described regarded in the illustrative sense rather than in a limiting sense. Having. novv7 however, set forth the objects and nature ot my invention. and havingf shoivn and described a structure embodying the principles thereof, what l claim as new and useful and of my own invention, and desire to secure by Letters Patent ist* l. In a scale mechanism, thel combination with a Weight actuate-"l lever. ol heck rod :formed in two part y one above the lever and the other lieloiv it. :f pivotal snppm't ilior one end olt id lever` a platter rest. and means tor vetallv supporting said platter rest upon said lever both parts of said check reds beine( in sub variations.

the distance between the platter rest pivot and the fulcrum pivot and vin substantial vertical alignment with said platter rest.

3. In a scale mechanism, the combination with a weight actuated lever, of a check rod formed `in two parts, one above thev lever and the other below it, a pivotal support vfor one end of said lever, a platter rest, a pivot carried by said lever, a frame and a saddle pivotally carried by said frame and supported by said pivot, said platter rest being in turn supported by said frame.

4. In a scale mechanism, the combination with a weight actuated lever provided with a fulcrum pivot intermediate its ends, of -a check rod formed in two parts, one above the lever and the other below it, a pivot carried by said lever, a frame and a saddle pivotally carried by said frame and supported by said pivot, said platter rest being in turn supported by said frame.

5. In a scale mechanism, the combination with a weight actuated lever, of a pair of substantially parallel check rods, one positioned above said lever and the other below the same, a platter rest, and means for indirectly supporting said platter rest bysaid lever whereby said platter rest exerts a pull on said lever from below the same.

(i. In a scale mechanism, the combination with a weight actuated lever, of a pair o substantially parallel check rods, one positioned above said lever and the other below the same, a platter rest, and means for indirectly supporting 'said platter rest by said lever, said means having secured thereto a common anchor for said check rod.

7. In a scale mechanism, the combination with a weight actuated lever, of a pair of substantially parallel check rods one positioned above said lever and the other below the same, and means for securing the ends oi said check rods together without attachnient between said means and said lever.

8. In a scale mechanism, and in combination with a graduated scale member and a weight actuated rack rod for actuating the same, of a steelyard rod and spring, and a thermostat carried by said steelyard rod and connected to said rack rod for controlling the relative movement between the rack rod and said steelyard rod.

9. In a scale mechanism, and in combination with a graduated scale member and a weight actuated rack rod ,for actuatingr the same, of a steelyard rod and spring` and a thermostat carried by said steelyard rod and connected to said rack rod for varying the distance between said steelyard rod and said rack rod.

10. In a scale mechanism, and in combination with a graduated scale member and a weight actuated rack rod for actuating the same, of a steelyard rod and spring,

and a thermostatic strip rigidly fastened at one end to said steelyard rod and connected at its other end to said rack rod for controlling the relative movement between said rods.

11. In a scale mechanism, and in combination with a graduated scale member and a weight actuated rack rod for actuating the same, of a steelyard rod and spring, and a thermostatic strip rigidly fastened at one end to said steelyard rod and connected at its other end to said rack rod for varying the distance between said steelyard rod and said rack rod.

12. In a scale mechanism, and in combination with a graduated scale member and a weight actuated rack rodfor actuating the same, of a steelyard rod and spring, a lever connecting said rods, and a thermostatic device controlling the position of said lever.

13. In a scale mechanism, and in combination with a graduated scale member and a weight actuated rack rod for actuating the same, of a steelyard rod and spring, a lever connecting said rods, and a thermostatic device controlling the position oii said lever, one end of said thermostatic device being rigidly secured to said steelyard arm.

14. In a scale mechanism, and in combination with a graduated scale member and a weight actuated rack rod for actuating the same, of a steelyard rod and spring, a lever pivotally connected to said rods, and a thermostatic device for controlling the position of said lever.

15. In a scale mechanism, and in combination with a graduated scale member and a weight actuated rack rod for actuating the same, of a steelyard rod and spring, a lever pivotally connected to said rods, and a thermostatic device for controlling the position of said lever, one end of said thermostatic device being rigidly secured to said steelyard arm.

16. In a scale mechanism and in combination with a graduated scale and a rack rod for actuating the same, a weight-actuated lever for controlling said rack rod, a casing for enclosing said rack rod, a casing for enclosing said weight-actuated lever, of a steelyard rod and spring located in said rack rod casing, a thermostat carried by said steelyard rod and connected to said rack rod for controlling the relative movement between said rack rod and said steelyard rod, and a passage between said casings through which to permit operative connection between said steelyard rod and said weight-actuated levers.

In testimony whereof I have hereunto set my hand May A. D., 1922.

LEONARD T. JOHNSON. 

